Outside of the extremist media literally nobody is talking about any sort of collapse. All societies have their issues and actions against 'others' are unlikely to save them.
As for Musk I consider him to be a nasty person with severe issues who happens to have his own media platform. That has nothing to do with his wealth, but then he turned down an opportunity to help solve world hunger and he's much richer now. I'm not against people getting rich, but I'm more interested in those who choose to do good with it.
Of course your government approved "non-extremist" media is not telling you what basic maths & biology makes obvious. They want to keep you compliant and easily controlled.
Don't study "non-approved" history either. Civilisations that don't have enough kids get invaded by barbarians and killed off. Happened to the Greeks, the Romans & many others.
You are lucky that you are on Hive so can get an alternative perspective.
To the extent their even is "world hunger", a ridiculous term, it is caused by corrupt governments and no amount of money can solve it. There is plenty enough food in the world and far less people are hungry than ever before.
Musk is doing far more important things. Earth cannot be fixed without humanity becoming multi-planetary, just as Europe couldn't be fixed without the colonisation of America.
Musk is saving humanity and giving it a bright future.
Musk could help the world more by not stirring up hatred. All that wealth and he still seems unhappy. I could almost pity him.